3520969 has 4 divisors (see below), whose sum is σ = 3602896. Its totient is φ = 3439044.

The previous prime is 3520939. The next prime is 3520973. The reversal of 3520969 is 9690253.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3520969 - 2⁷ = 3520841 is a prime.

It is a super-2 number, since 2×3520969² = 24794445397922, which contains 22 as substring.

It is a Duffinian number.

3520969 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3520939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40899 + ... + 40984.

It is an arithmetic number, because the mean of its divisors is an integer number (900724).

Almost surely, 2^3520969 is an apocalyptic number.

It is an amenable number.

3520969 is a deficient number, since it is larger than the sum of its proper divisors (81927).

3520969 is an equidigital number, since it uses as much as digits as its factorization.

3520969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81926.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 3520969 is about 1876.4245255272. The cubic root of 3520969 is about 152.1320557139.

It can be divided in two parts, 3520 and 969, that added together give a square (4489 = 67²).

The spelling of 3520969 in words is "three million, five hundred twenty thousand, nine hundred sixty-nine".